uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Molecular phylogeny and systematics of Polyblastia (Verrucariaceae, Eurotiomycetes) and allied genera
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Systematic Botany.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Systematic Botany.
2008 (English)In: Mycological Research, ISSN 0953-7562, E-ISSN 1469-8102, Vol. 112, no Part 11, 1307-1318 p.Article in journal (Refereed) Published
Abstract [en]

Phylogenetic relationships of the lichen genus Polyblastia and closely related taxa in the family Verrucariaceae (Verrucariales, Chaetothyriomycetidae) were studied. A total of 130 sets of sequences (nuLSU rDNA, nuITS rDNA and RPB1 region A-D), including 129 newly generated sequences, were analysed. Phylogenetic relationships were inferred using a Bayesian approach based on two datasets. A first analysis of a larger, two-locus dataset (nuLSU and RPB1) for 128 members of the Verrucariaceae, confirmed the polyphyly of Polyblastia, Thelidium, Staurothele, and Verrucaria, as currently construed. The second analysis focused on 56 Polyblastia and allied taxa, but using an additional locus (nuITS rDNA) and two closely related outgroup taxa. The latter analysis revealed strongly supported groups, such as Polyblastia s. str., the Thelidium group (a mixture of Polyblastia, Thelidium, Staurothele and Verrucaria species). The genus Sporodictyon, which is here accepted, also accommodates Sporodictyon terrestre comb. nov. Morphological features traditionally used for characterizing Polyblastia, Thelidium, Staurothele and Verrucaria, such as spore septation and colour, occurrence of hymenial photobiont, involucrellum structure, and substrate preference, were found to be only partially consistent within the strongly supported clades, and thus are not always reliable features for characterizing natural groups.

Place, publisher, year, edition, pages
2008. Vol. 112, no Part 11, 1307-1318 p.
Keyword [en]
Cardinal characters, RPB1, Sporodictyon, Staurothele, Thelidium, Trimmatothele, Verrucaria
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-96490DOI: 10.1016/j.mycres.2008.05.002ISI: 000261368000004OAI: oai:DiVA.org:uu-96490DiVA: diva2:171079
Available from: 2007-11-22 Created: 2007-11-22 Last updated: 2014-09-03
In thesis
1. Phylogeny and Taxonomy of Polyblastia and allied taxa (Verrucariaceae)
Open this publication in new window or tab >>Phylogeny and Taxonomy of Polyblastia and allied taxa (Verrucariaceae)
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Polyblastia A. Massal. is a genus of lichenized fungi belonging to Verrucariaceae (Ascomycota). Traditional classification heavily rested on a few cardinal characters, primarily ascoma structure and spore morphology, but the delimitation of Polyblastia was problematic. Using DNA sequences from nucLSU, and RPB1 the position of the ‘Polyblastia group’, as a strongly supported clade within Verrucariaceae, was confirmed. A three marker phylogeny (including nucITS) based on a wide taxon sampling reveals strongly supported clades within the ‘Polyblastia group’. Thus Polyblastia s.str. is recognized. The phylogeny of the strongly supported Thelidium clade is not completely resolved. In a different clade, Verrucaria rupestris, the type of Verrucaria, is a sister to the Henrica melaspora/H. theleodes clade. Trimmatothele perquisita, the type of Trimmatothele, forms a strongly supported group with a Verrucaria species. The genus Sporodictyon, until recently included in Polyblastia, is resurrected.

Species delimitation in Sporodictyon is investigated, and the morphological variation within and between the monophyletic groups is evaluated in an effort to reconcile morphological and molecular data. A taxonomic revision of Sporodictyon, occurring in Northern Europe and the adjacent Arctic is provided, and two new species are described. A comprehensive material is investigated, a key to the species is provided.

A generic revision of the family Verrucariaceae, based on recent molecular phylogenetic analyses and previous morphological studies, is offered. Three new genera (Hydropunctaria, Parabagliettoa and Wahlenbergiella) are proposed. Several other monophyletic groups are identified for which the taxon sampling is insufficient for proposing taxonomic changes. The nomenclature of the genera in the family is revised, including the study of type materials and several lectotypifications are suggested.

The new genus Atla (Verrucariaceae) is described, and three new species to science, A. alpina, A. palicei and A. praetermissa, are included. An identification key to the species and a revision of the genus is supplied.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2007. 33 p.
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 370
Biology, Phylogeny, Taxonomy, ITS, LSU, RPB1, Nomenclature, Biologi, Polyblastia, Verrucariaceae, Sporodictyon, Atla, Thelidium, Verrucaria, Staurothele, Trimmatothele
urn:nbn:se:uu:diva-8326 (URN)978-91-554-7035-7 (ISBN)
Public defence
2007-12-14, Lindahlsalen, EBC, Norbyvägen 18A, Uppsala, 10:00 (English)
Available from: 2007-11-22 Created: 2007-11-22 Last updated: 2009-04-02Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Savić, SanjaTibell, Leif
By organisation
Systematic Botany
In the same journal
Mycological Research
Biological Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 309 hits
ReferencesLink to record
Permanent link

Direct link